A large and persistent carbon sink in the world's forests. – ScienceOpen
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      A large and persistent carbon sink in the world's forests.

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          Abstract

          The terrestrial carbon sink has been large in recent decades, but its size and location remain uncertain. Using forest inventory data and long-term ecosystem carbon studies, we estimate a total forest sink of 2.4 ± 0.4 petagrams of carbon per year (Pg C year(-1)) globally for 1990 to 2007. We also estimate a source of 1.3 ± 0.7 Pg C year(-1) from tropical land-use change, consisting of a gross tropical deforestation emission of 2.9 ± 0.5 Pg C year(-1) partially compensated by a carbon sink in tropical forest regrowth of 1.6 ± 0.5 Pg C year(-1). Together, the fluxes comprise a net global forest sink of 1.1 ± 0.8 Pg C year(-1), with tropical estimates having the largest uncertainties. Our total forest sink estimate is equivalent in magnitude to the terrestrial sink deduced from fossil fuel emissions and land-use change sources minus ocean and atmospheric sinks.

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          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          American Association for the Advancement of Science (AAAS)
          1095-9203
          0036-8075
          Aug 19 2011
          : 333
          : 6045
          Affiliations
          [1 ] U.S. Department of Agriculture Forest Service, Newtown Square, PA 19073, USA. ypan@fs.fed.us
          Article
          science.1201609
          10.1126/science.1201609
          21764754
          a8e19264-78d9-489a-96be-6bc9be0421f6
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